OSCILLOSCOPE CALIBRATOR

MODEL 6125A

OSCILLOSCOPE CALIBRATOR MODEL e12~A

TlME/DIV 1l"S' RGE & -~"£n

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o Amplitude, Time, Risetime and Syncronization/Trigger Calibration for all Oscilloscopes to 250 MHz

o Simplicity of Use - Pushbutton Switching of Function and Multiplier Circuits

o Direct Reading of Percentage Error of Calibration Waveform

o Reduced Calibration Costs

o Negligible Operator Training Time through use of Deviation Principle

o Timing Accuracy 0.01% Amplitude Accuracy 0.25%

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The Model 612SA provides in one compact, easy-to-use package, all facilities for the most accurate calibrations of oscilloscope parameters possible, outside of the standards laboratory. It comprises three precision instruments: a voltage calibrator; a sweep-time and delay-time calibrator; and a rise-time calibrator. Not to be confused with less accurate instruments of limited range, the Model 6125A approaches secondary-standard accuracy and stability in all calibratingsignal parameters ... yet it costs less than the 3 individual instruments it replaces,

It is simple to use. The operator sets the amplitude or time control to the value required, depresses the appropriate fum;tion and multiplier buttons and observes the waveform on the oscilloscope, If the trace docs not coincide with the appropriate graticule, the deviation control is adjusted until it docs, when the error can be read directly off the meter as a percentage,

SPECIFICATIONS MODEL 6125A

VOL TAGE CALIBRATOR Ranges

(a) Volts/OMsion: 10 JlV to 20 V 20 ranges in I, 2, 5 sequence

(b) Nllmberofdil'isions multiplier: X 3,4,5,6.8, IO Absolute Range: 27 JlV to 220 vults

Deviation ranges: ±3?!, and ±101 Output Modes: AC' I kH7. ±0.01 '/1 positive going square wave

(Crystal Controlled Frequency) DC positive DC negative GND

Continued

Accuracy: Bctter than ±O,25 % into opcn circuit Offset: Less than ±S JlV below 50 mY, (After use on ranges above 50 mY, a five minute settling time is required tu avuid thermal effects) Less than ±SO JlV above SO mV NotC': The same offset is obtained on a/l output IllOdes illcluding ZC'ro. Ripple and Hum: Better than 0.1 ';;, +2 JlV p-p Square wave riseti me: Less than 5 iJ.' Square wave overshoot: Less than O.5'Jf Regulation (for 1 Mnload): Varies between 0 and 0.27% depending on setting. Deviation Accuracy: ±I 'j!, FSD ±2.5'fr. of reading

BALLANTINE LABORATORIES, INC. FOUR DECADES OF INNOVATION IN ELECTRONIC INSTRUMENTATION

SPECIFICATIONS MODEL 6125A

Overload Protection: Prolected against overload of shorl dura tion Reference: High qualilY zener diode, (Temperature coefficient ± 0.002% per DC) Temperature Coefficient of Output (10·300 C): Better than ±O.O I % per ° C (± 100 ppm/DC) Line Regulation for ± 10% change: ±0.02% maX Stability: ±O. I 0% per year (maximum)

TIME CALIBRATOR Ranges: 10 nsec to S s~'Cond intervals

RISETIME CALIBRATOR & TRIGGER OUTPUT

Amplitude: 200 mV to 2S0 mV continuously vaIiable into 50 n (400 mV-SOO mV open circuit) Risetime: Less than I nsec positive going into 50 n Period: I iJ.Scc to I second in 7 decade steps Waveform: Square Wave Overshoot: Less than 2% Accuracy: Same as Time Calibrator

LINE FREQUENCY SYNC OUTPUT (a) Time/Division: 10 nsec to O.S sec/div - 21 ranges in I, 2, S sequence

(b) Multiplier (Number ofDivisions): X I, 2, S, 10 (on 100 nsec 10 O.S secs/div only)

Amplitude: Continuously variable from 0 to 1 volt peak-to-peak from 2 kn source max.

Deviation Ranges (for 100 nsec/div to 0.5 sec/div): ±3% and ± I 0% Accuracy

(a) Crystal controlled: ±0.01 % of setting (b) Deviation 3 % range: ±O.I % (e) Deviatioll JO% range: ±0.2%

Amplitude (a) 100 nsec/div to 0.5 sec/dil': 1.0 V (typical) into SO n

(1.4 V min into open circuit) (b) Less than 100 nsec/div: 1.0 V p-p (typical) into SO n

Pulse shape and width (a) 100 nsec/div to 0.5 sec/div:

Spike, width at base 10% of pulse interva l (b) below 100 nsec/div:

Sinewave

Waveform: Follows powerline sinewave

GENERAL INFORMATION

Power Requirements: 100/125 or 200/2S0 volts r.m .s., 17W, 50/60 Hz Operating temperature: O°C to +50°C ambient. Storage temperature: 40°C to +70°C ambien t. Humidity: to SO% RH for full accuracy; to 95% RH operating Dimensions: 16 3/S" wide, 51/4" high x 12" deep overall. (415.6 mm x 133.5 mm x 304.S mm.) Weight: 15 Ibs S oz (7.0S kg.)

31 100 (14.2 kg) shipping weight.

PRICE: $1875.00

Note: All accuracies specified at 23°C fl oC with full compellsation for output loading and referenced to a standard traceable to NBS with uncertainty of±O.OJ%.

VOL TAGE CALIBRA TOFI

An accurate DC voltage , posi tive, negative , or zero , and a I kHz positive·go ing square wave are prov ided for amplitude calibrati o n. The main output volta ge control switch is designed to correspond with that on most oscilloscopes. Pushbutton Switchin g, plus a deviation control , com bine to allow the devia tion meter to indica te perce ntage error directly . The I kHz square wave is c rystal controlled .

m os t oscilloscopes. Pushbutton switching, pills a dev ia tion control , combine to allow the percentage error to be read direc tly fr o m the deviation meter.

RISETIME CALIBRATOR

A I Hz-I MHz squa rewave having faste r than I nanosecond risetime is prov id ed for risetime measurements. Both th e risetime and the bandwidth of the amplifier can be checked , us ing this fast pulse. The time base of the oscill oscope is first calibra ted with th e Mod el 612SA and then the risetime o f the calibration pulse is measured on the Screen .

SYNCHRONIZAnON/TRIGGER CHECK

A SO/60 sinewave output of va riable amplitude is available for the checking of trigger Circuits at lin e frequency.

TIME CALIBRATOR

A high·s tability quartz·erystal controlled time·mark generator provides time·calibration pulses. The section is split into two ra nges , each with its own output. The time per division switch correspond s to that on

The ultra· high spced ca pabilities of the Model 61 2SA, permit precise calibra tion of realtime sc opes with 100 MHz bandwidths, a nd it is usable up to 500 MHz bandwidth.

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~~ BALLANTINE LABORATORIES, INC . ..~, POBox 97 . Boonton . NewJersey 07005. Ph one (2011 335·0900. TWX (710) 9878380 ~ Four Decades of Innovation m Electronic InstrumentatIOn

U.S. Sales Prices f.o.b . Boonton, New Jersey Spec i fications and price, subject to ct"langa without notice.

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MODEL 7050A ELECTRONIC

SIGNAL ..-, , '_ 1II1C-OIIP • I-

This unique new instrument "captures" signals (transient or repetitive) by recording them on a small tape loop . and then provides a vel'S8tile , stable, linear, essentially noise-free reproduction interface that permIts the captured signal to be analyzed at leisure_ The Ballantine Electronic ignal Recorder (ESR) may be coupled to any waveform/spectrum inst rument, from conventional oscilloscopes to spectrum, wavefo rm _ or vibration analyzers and Fourier plotters . The ESR converts any sc.ope into a storage scope - with the important advantages of much greater signal-analysis flexibility , higher contrast , faster effective writing rate, and (with 2 ESR's) two-

HOW IT'S USED . . .

Because the ESR can be used to provide "instant replay" of captured signals with so many different instruments, the simple steps described here may vary slightly from applica· tion to application. These procedures are given for use with an oscilloscope. NOTE: See next page for variations in these procedures.

1 Slip tape loop on spindles- ingenious tapered design automatically draws tape into correct position. 2 Interconnect signal ESR, and scope as shown on page I, and set scope sensitivity to 100mY/cm and trigger

control to EXT. (ESR provides both plus and minus trigger· slope selection .)

3 Set ESR sensitivity control to appropriate level for Signal. (If you don't know correct level , simply switch ESR to "THRU" Mode, and check the signal, as you ordinarily would, directly on scope.) Press the Playback button. Now you're ready.

4 Press the RECORD button . The next 20 milliseconds of signal (of adequate level , as set in step 3) will be re~orded , after which the RECORD light will go out, and the PLA YBACK light will go on, indicating signal capture. Now the tape is being read repeatedly , and the captured signal is being displayed on the scope . (You may have to set the trigger level of the scope, but this is only done once, for all recordings.)

SNow you can observe, analyze, and even photograph , the captured signal, at your leisure . Using the horizontal·position control (output trigger delay) on the ESR, in combination with the scope's sweep·rate control, you can "zero in" on any small part of the waveform (with· out significant jitter) you or can look at the whole 20 milli· seconds of recording. You can't lose any of the leading edge , either - there 's a built·in delay after the sweep starts. On the rear of the ESR is a pulse that can be used for Z·axis blanking or brightening , to identify the start of the recording . NOTE: With two ESR's, you can compare an old tape with a new one, too! You can also copy tapes from one ESR to another.

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• •'---=. RECORD---1 IJOLTS IOI IJ

L"."..~ MODE OUTPUT • J\. -

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APPLICATIONS include almost any requirement for cap· turing and/or storing time·domain signals ... transient or repetitive, DC or AC coupled, with frequency components up to 250k Hz . Here is a partial list:

• "Instant Replay" of transients or repetitive signals on a conven tional CRO.

• Analysis of the frequency/energy components of a spec· trum, in conjunction with any swept·spectrum (or step· ped·frequency) device - e.g., microwave, RF, LF, AF, subsonic, noise, and shock/vibration spectra, from spec· trum analyzers, swept·frequency receivers , telemetry· channel scanners, etc.

• Detailed analysis of the impedance/transfer-function vs. frequency characteristic of a device, circuit, or compon· ent, in conjunction with network or impedance analyzers, triggered sweep·frequency oscillators, etc . (With two ES R's, comparison of these characteristics with standards .)

• Analysis of the harmonic (Fourier)content of a captured waveform, in conjunction with waveform analyzers, Fourier plotters, sampled-

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,HOW IT WORKS • • •

The 7050A operates in two modes: "RECORD," and "PLAYBACK." Mode switching ("TRANSFER") is accomplished automatically , by an internally or externally generated trigger signal, or manually by front panel pushbutton. The transfer may be delayed from 0 to 16 milliseconds after the trigger.

In the RECORD mode, the instrument continuously records input signals on a small endless loop of computer-grade magnetic tape, which is capstan driven by a brushless, constant-speed DC Hall-effect motor, at one revolution of the loop every 20 milliseconds. An erase head, positioned 16 milliseconds behind the recording head, continually erases the recorded signals after each revolution.

When a "TRANSFER" command is received, both recording and erasure cease , and the previous 20 milliseconds of recorded signals are read out as a continuously repeated, analog voltage signal. The recorded Read trigger signal is usable , as explained below, as a synchronization signal for the associated oscilloscope.

As the block diagram below indicates, the input signal is amplified, and used to FM modulate a 750kHz carrier. The resultant signal is fed through a Write amplifier to the recording head. Application of a TRANSFER signal , which may be derived from the input signal, from an external source, or by actuation of the PLAYBACK pushbutton, disconnects the erase head and switches the recording head to the playback amplifier. The recorded signals are fed through the playback amplirier to the demodulator, which removes the FM carrier, recovering the original signal.

e In the PLAYBACK mode, a trigger output is available, for triggering the scope sweep. A unique feature of the ESR is its ability to transfer, manually or automatically , from RECORD to PLAYBACK, with an adjustable delay period, selected by front panel controls. A second adjustable delay of the sweep-trigger output permits precise examination of any small segment of the recorded waveform, by sweep expansion of the recorded signal. No other signal-storage medium - storage scope or photograph - has this capability .

The sweep trigger can thus be adjusted in phase with respect to the recorded signal . . . similar to a scope delayed sweep. Thus, the scope time base trigger may be advanced or delayed with respect to the ESR's zero-reference signal.

F.xamillc tlte emire lO-millisecond recording, at all appropriate sweep speed . . about 2 millisec/clII , for a I O-e/ll graticule.

Usillg lite dewy conlrol Oil the ESR for positioJ/illS, Qnd higher sweep speed, "zoom ill " Oil allY part of tire captured sigllal. Use Ihe ES/~ SCI/sitillily conlro l for verlicalexpallSioll, If lIaessary .. . tlte ESR has a vcr)' wide dynamic rallge. (Illd yery low 1I0ise.

High effective writillg rote f3,OVO dMsiolls! mil/lsecond) permits display of very fa st . ,ingle -.llto t trallsiellts.

EL ECTRONIC RECORO ..TRANSFER

EXT fRNAl TRI GGE R

CONTROL

1 TRIGGER OUTPUT TO f---- OSCILLOSCOPE I---Jl Z·AXIS MOD ULATOR OUTP'UT

SPECIFICATIONS

RECORDING:

Frequency Range: DC-100kHz (3dB), usable beyond 200kHz.

Rise Time: 3.6/lsec.

Storage Time Period: 20 mS maximum. Input Sensitivity 9 ranges in 1,2.5,5 sequence

(for an oscilloscope 4/10/20/40/100 mV/cm deflection coefficient 0.2/0A/I/2V/cm of 100mV/cm)

Input Signal for Full Recording Level: 10 x input sensitivity.

Maximum Input Voltage: 400 volts (DC plus peak AC).

Input Impedance: I Mn ±5%, 36pF ±2pF, compensated on all ranges for use with attenuator probe . Distortion: < I .5% at I kHz.

TRANSFER COMMAND:

Automatic, from input signal. External, by control pulse. Manual.

Transfer Trigger Level Range: ±5 x input sensitivity (internal).

Transfer Level Range: ±5 x input sensitivity (internal).

Transfer Slope: positive or negative.

External Transfer Trigger Sensitivity:

;;;'50 mY, t ;;;'100 nsec.

Input Impedance, Externa'l Transfer Trigger Input: IMn,

36pF.

Transfer Delay: adjustable 4 to 20msec.

TAPE STORAGE Ca ptured signals may be stored indefinitely, provided tha t they are not exposed to very high magnetic fields, or high temperatures. The all-steel storage capsule shown here provides adequate magnetic shielding for all ordinary environments, and provides a label for identification and dating of the signal stored. Order as Model 70502A Tape Storage Capsule, $5.00 for a package of ten. (Quantity discounts are obtainable on request, from factory.)

PLAYBACK:

Output Level for Full Modulation: ±0.5V (l V p-p).

Signal to Noise Ratio During Full Level Recording:

;;;. 34 dB dynamic range, referenced to full scale.

Signal Output Source Impedance: ,,;;; 50 n.

Repetition Frequency of Recording: 50 Hz (approx .).

Ground Reference: Short-duration reference level

pulse recorded on tape at instant of transfer.

Ground Reference Adjustment: permits offsetting

recorded signal ±3 x input - sensitivity setting, via

front-panel control.

PULSE OUTPUTS:

Trigger for Oscilloscope: amplitUde, > 13V into open

circuit.

Trigger Delay : 4 .. . 17 mS - continuously adjustable.

Signal Blanking for Oscilloscope: amplitude, > 13V

into 0 pen circuit.

PHYSICAL, ENVIRONMENTAL:

Dimensions: Width I 1.25" (300mm)

Height 4.3 "(I10mm)

Depth 9.5 "(240mm)

Weight: 6~ pounds approx. 2 .95 kg approx.

Power Requirements : 115/230V, ±IO%, 50 to 60 Hz,

35 Watts.

Ambient Temperature Range: O°C to +40°C operating.

_ 30°C to +7 5°C storage.

Price : $985.00 f.o.b. Boonton, New Jersey. U.S.A .

Each Model 7050A Electronic Signal Recorder is furnished with one complete Tape Kit , as shown here. The kit contains five recording loops (each usable for more than eight hours of continuous operation) and one cleaning loop (used for cleaning the tape heads, about every eight hours of continuous operation). Order as Model 7050 I A Tape Kit, $10.00 each. (Quantity discounts are obtainable on kits or on bulk quant ities of tape loops on request, from factory.)

~ ~~~~,~~~:~,~",~~~,?,,~::?~:~S. IN::~", (201) 3350900, TWX (710)9878380 •l!~ Four Decades of Innovation in Electronic Instrumentation U. S . Sales Prices f.o.b. 800n1On, New Jersey

Specifications and prices subject to change without notice . 3078-5/ 72 Printed in U .S.A.